Mining apparatus



Nov. 16, 1937. D. R. RICHARDS 2,099,373

MINING APPARATUS Filed April 26, 1934 6 Sheets-Sheet 1 Nov. 16, 1937. D.R. RICHARDS 2,099,373

' MINING APPARATUS Filed April 26, 1954 6 Sheets-Sheet 2 M Q kw 7 ggi A2I N a A E g QR m w fifi a 3% Q, .fim w A Nov. 16, 1937. D. R. RICHARDSMINING APPARATUS Filed April 26, 1934 e Sheets-Sheet 3 NW q QQN QW vJAN/A i E 1% a Z w m M. Z a M M k Q 3 W\\m-\ w n Q ww w% @m 4 3% A M MNQMN Q mw W W QT H H -fiii I g flay w SN nu I Q mm? 3% Q s. v NM. %N\ %wWK kww NR 1 R Law w R E Mm Q w QM 5 3 Q w mw N E Nov. 16, 1937. D. R.RICHARDS MINING APPARATUS Filed April 26, 1954 6 Sheets-Sheet 4 11% zahZZZ Nov. 16, 1937. ,D. R. RICHARDS MINING APPARATUS Filed April 26, 19346 Sheets-Sheet 6 ww mmw Jim/6min, zy/zZRAic/zard: .9

. paratus.v

Patented Nov. 16, 1937 PATET OFFICE MINING APPARATUS Dwight R. Richards,Claremont, N. H., assignor to Sullivan Machinery Company, a corporationof Massachusetts Application April 26, 1934, Serial No. 722,568

48 Claims.

This invention relates to mining apparatus, and more particularly toimprovements in coal mining apparatus of the combined horizontal andshear cutter, wheel mounted type, adapted to operate from the minetrackway.

An object ofthis invention is to provide an improved coal miningapparatus. Another object is to provide an improved coal miningapparatus of the combined horizontal and. shear cutter type having animproved adjustable supporting structure for the kerf cutting'mechanismwherebythe kerf cutter may be positioned through a relatively widecutting range. Yet another object is to provide an improved adjustablesupporting structure for the kerf cutting mechanism, having a relativelygreat universality whereby the kerf cutter may be positioned to cutkerfs in any deired location in the coal'face and ribs, thereby suitpractically any mining conditions encouned. A further object is toprovide an improved pporting and adjusting structure whereby the rfcutter may be supported and adjusted in an iproved manner, and whereinan improved vinging arm structure is providedfor supportmg the kerfcutter, and having adjustment horizontally and vertically, thereby toposition the kerf cutter to cut horizontal kerfs at any desired locationbetween the mine floor and mine roof, and to cut vertical kerfs at anydesired location between the ribs and in the ribs. Yet another object isto provide an improved mining apparatus of the wheel mounted, tracksupported and guided type having improved adjustable kerf cuttingmechanism whereby kerfs may be cut at or near the level of the minefloor outside and below the'le'vel of the mine trackway, in any desiredhorizontal plane between the mine roof and the mine floor, and invertical planes. Still another object is to provide an improved coalmining apparatus having improved kerf cutter supporting and adjustingmeans of a truly universal character whereby an extremely wide range ofadjustment of the kerf cutter is possible.

Still another object is to provide, in a mining apparatus of the abovecharacter, improved adjusting and swinging mechanism for the kerf cutterand improved mechanism for propelling the ap- These and other objectsand advantages of the invention will, however, hereinafter more fullyappear in the course of the following description and as moreparticularly pointed out in the appended claims.

In the accompanying drawings there is shown, for purposes ofillustration, one form which the invention may assume in practice.

In these drawings,'- Fig. 1 is a plan view of the illustrative form theimproved mining apparatus.

Fig. 2 is a side elevational View of the mining apparatus shown in Fig.1, with the cutting mechanism shown in transport position, as indicatedin full lines.

Fig. 3 is a central, longitudinally extending, vertical sectional Viewtaken substantially on line 33 of Fig. 1.

Fig. 4 is a longitudinally extending vertical sectional view'takensubstantially on line 44 of Fig. 1. r

'Fig. 5 'is a detail sectional View taken on line 5--5 of Fig. 4.

Fig. 6 is a horizontal sectional view taken substantially on line 66 ofFig. '7.

Fig. '7'is a longitudinally extending, vertical sectional view takensubstantially on line 11 of Fig. 1;

Fig. 8 is a detail sectional View taken on line 88 of Fig. '7. v Fig. 9is a cross sectional-view taken on line 99 of Fig. 7.

Fig. 10 is a detail horizontal sectional view taken on line Ill-l0 ofFig. 7.

Fig. 11 1s a cross sectional view taken on line Ii-ll of Fig.4.

Fig. 12 is a cross sectional iew taken on line l2l2 of Fig. 4.

Fig. 13 is a fragmentary side elevational View, with parts shown invertical section, showing a portion of the arm swinging mechanism.

Fig. 14 is an enlarged horizontal sectional View showing details of thepropelling mechanism.

Fig. 15 is a cross sectional View taken on line I5i5 of Fig. 14.

Fig. 16 is a cross sectional View taken on line l6l6 of Fig. 14.

Fig. 17 is a horizontal sectional view, with parts shown in plan,illustrating the cutter swinging mechanism, the view being takensubstantially on line l1ll of Fig. 3.

Fig. 18 is a detail View showing a portion of the mechanism of Fig. 17.

Fig. 19 is a diagrammatic view showing the improved hydraulic controlmeans for the various hydraulically operated devices. I

In this illustrative embodiment of the invention, there is shown a coalmining apparatus of the combined horizontal and shear cutter, wheelmounted type adapted to operate while supported and guided by a minetrackway, commonly known as a coal saw of the track type, and genahorizontally swingable frame structure 2; a vertically swingable armstructure, generally designated 3, a revolving support 4, and aswingable cutter support 5. the form of a low compact truck framefimounted .on truck wheels 1 adapted to run along a mine trackway 8 laidon the mine floor. The swingable frame 2 is in the form of a horizontalturntable 9 having a projecting horizontal arm Ill overlying the forwardend of the base and supporting at its outer extremity a depending frameportion H on which the arm structure 3 is pivotally mounted on ahorizontal axis at l2 for swinging movement 'in a vertical directionrelative to the frame 2. The revolving support 4, which might be termeda rotatable cutter head, projects forwardly from the outer extremity ofthe arm structure 3 to form an elongation of the latter, and isrotatable about the longitudinal axis of the arm structure on an axialline extending radially with respect to the arm pivot axis I2.

The cutter support 5 is swingably mounted at I3 about an axis arrangedat right angles with respect to the axis of rotation of the support 4,,and pivotally mounted at I4 about an axis at right angles with respectto the cutter support axis I3 is an elongated plane kerf cutter [5.Improved devices are provided for swinging the frame 2 with respect tothe'truck, for swinging the arm structure, for revolving the cutter headsupport 4 with respect to the arm structure, and

rectly above the truck; wheel axes in aposition overlying the wheelbase, and is guided for horizontal swinging movement with respect to thebase by an annular bearing flange I1 extending about the periphery ofthe circular turntable casting l8, and this bearing flange is guided inan arcuate guideway l9 formed by means of a segmental plate 20 securedby screws 2| to the top of the truck frame 6. The turntable casting 18is also provided with a circular frame portion 22 journaled in a bearingsleeve 23 supported within a circular projection 24 formed integral withthe truck frame. The arm-like portion I 0 of the turntable casting, asabove mentioned, overlies the base frame, "and thedependingframe portionI! overhangs the forward end of the base; and this arm portion isguided, on horizontal swinging movement of the turntable castingrelative to the base, by means of an arcuate guide flange 25 formedintegral with the truck frame and 'with which an underlying lip 26formed on .a guide block 2'! engages. The block 2l:is secured betweendepending side flanges formedon the bot- 7 tom portion of the arm l0,and is secured in posi-; tion on the arm by bolts 28. The flang'e25 isalso provided with an upstanding projection engaging an arcuate bearingportion 29 formed-on an arcue ate projection-36 integral with thebottomportion of the arm Ill.

The arm structure 3 has formed thereon lateral lugs 35 formed integralwith the depending frame portion 1 I, and the rearward portion of thisarm structure is provided with a spherical housing 36 projecting in achamber 31 formed within the depending frame II and mounted to revolveThe portable base is herein in' supporting frame 43; and the forwardextremity of the tubular portion 4| is, as shown in Figs. 6 and l,secured, as by welding or otherwise, at 44, to a-cylindrical portion ofa front support 45, the latter forming the forward extremity of therevolving cutter head support and the outer extremity of the armstructure on which the cutter support 5 is swingably mounted.

'Now referring to the improved cutter driving means, it will be notedthat mounted ontne rearward portion of the truck frame at'the rear of,

the turntable 9 and supported independently of thealatter, is a'motor 41whichconstitutes the sole prime'mcver for the various mechanisms anddevices "of the apparatus, This motor is herein preferably of thereversible electric type,"having a suitable electrical controlling'andreversing apparatus48. The power shaft 49' of this motor is hereinhorizontally disposed and extends longitudinally of the. apparatus, andis secured by a v suitable coupling .50 to an alined transmission "shaft5i, herein suitably journaled within the truck frame." Formed integralwith and'rotatable with the bevel gear 53 is a' bevel gear 55 meshingwith a bevel gear,5l keyed to the rear end-"of a horizontal,transmission shaft.58., As shown in Fig. 3, this transmission shaft issuitably journaled in the swinging turntable frame 2 and projects at itsforward end within the chamber 3 'l.' Keyed to this projecting end ofthe shaft 58 is a bevel gear 59' meshing, as shown in Fig. 5, with abevel gear 69 keyed to a horizontal shaft 6| suitably journaled withinthe spherical frame portion 36 of the swinging arm shaft is connectiblein driving relation with the shaft 63 by a sliding clutch member'66having clutch teeth interlocking with teeth on the shaft 65 andengageablewith clutch teeth 61 formed on the forward end of theshaft'63; This clutch member 66 is prcvided' with a clutch shipper 68having a suitable operating handle69 conveniently arranged exteriorly ofthe arm structure, as shown in Fig. 1.

' As shown in Figs. G'and 7, the forward end of thettransmission shaft65 has keyed thereto a bevel gear 10 meshing with a bevel gear 1|journaled on suitable bearings supported by a stub shaft 12 arrangedwith its axis angularly'dis posed with respect to the axis of shaft 65and 65 and the pivotal axis I3 of the swingable cutter support 5. Thisbevel gear II meshes with a bevel gear I3 keyed to a shaft 14 suitablyjournaled within bearings supported by the front support 45 of therevolving support and the frame I5 of the swingable cutter support 5.This shaft I4 is herein arranged with its axis alined with the pivotalaxis I3 of the swingable cutter sup-' port 5, and has keyed thereto androtatable therewith a bevel gear I6 meshing with a bevel gear 'I'I keyedto a shaft I8, herein journaled within the swingable cutter supportframe I5 and arranged with its axis coinciding with the bar pivot axisI4. Secured to the shaft I8 and driven thereby is a chain sprocket I9which engages and drives an endless cutter bit carrying cutter chainmounted on the margin of an elongated, extremely thin, plane cutter bar8| for circulation thereabout, the cutter chain and cutter bar formingthe component elements of the kerf cutter I5.

As mentioned above, the kerf cutter I5 is mounted for pivotal movementwith respect to the swingable cutter support 5, and the mounting meansfor the kerf cutter herein comprises a' hanger frame 82 having acircular bearing portion 83 rotatably mounted on bearing sleeves84supported by a central circular portion 85 of the cutter support frameI5. As shown, this circular portion 85 surrounds the shaft I8 andprovides supporting means for the bearings of this shaft. Integral withthe circular bearing portion 83 of the hanger frame is a circumferentialflange 86, and this flange is provided with a plurality of radiallylocated notches 8'I spaced circumferentially about its peripheral edgeand with which there is engageable a rotatablelocking pin 88 rotatablymounted in a bearing sleeve 89 supported by the cutter support frame I5.This pin is provided with suitable turning means, and a transverse slot90 is cut in its body so that when the pin 88 is rotated into itsreleased position, the hanger frame 82 is'free to swing with respect tothe cutter support frame I5. To provide tightening means for the cutterchain, the cutterbar 8| is formed, as shown in Fig. 9, with lateralguides 92 receivable in guideways 93 formed on the hanger frame 82, sothat the cutter bar may slide radially endwise with respectto thechainsprocket axis, and the means for adjusting the bar comprises a bolthaving a T-shapedhead 96 seated with a complemental socket 91 formed inthe adjacent face of the hanger frame 82 and held within'the socket bythe adjacent surface of the bar 8|, in the manner shown in Fig. '7.Threadedly engaged with this bolt is a rotatable nut '98 journaled in asupport 99 formed on the bar, and this nut is held against axialmovement with respect to this support so that when the nut is rotatedthe latter moves axially with respect to the bolt, thereby to move thecutter bar 8| relative to its guideways on the hanger frame.

Cooperating with the annular bearing member 83 and bearing sleeve 84 inguiding the cutter bar during swinging of the latter, there is formed onthe cutter support frame I5 an arcuate flange I00, held in a guidewayIOI on the hanger support by a segmental plate I82 secured to the hangersupport by screws; the elements I00, IOI, I02 cooperating to form anarcuate guide on a radius struck from the cutter bar pivot axis I4. Itwill thus be seen that the kerf cutter may be locked in differentpredetermined angular positions with respect to the cutter support andmay be entirely released for free swinging movement with respect to thecutter support.

Now referring to the improved mechanism for rotating the revolvingcutter head support t relative to the arm structure 3 and for swingingthe cutter support 5 with respect to the revolving support, it will benoted'that keyed to the transmission shaft 63 of the arm structure is aspur gear I03 meshing with a spur gear m4 journaled, as shown in Fig. 4,on a transmission shaft I95, the latter in turn being journaled withinthe arm structure 3 and arranged parallel with the shaft 63. Also keyedto the shaft 53 is a spur gear i235 meshing, as shown in Fig. 11, withan intermediate gear I01, in turn meshing with a spur gear'iiiiiarranged coaxial with the gear I04 and similarly journaled on the shaftI65. It will thus be seen that the gear elements I94 and 08 constitutethe terminal elements of a reversing mechanism for rotating the shaftI05 in either of opposite directions; and these terminal elements areselectively connectible in driving relation with the shaft E95 bymultiple'disc clutches I99 and I Iii, respectively. These clutches havesuitable operating means I i i mounted on the shaft I05 between theterminal gear elements and provided with suitable ball bearing pressureplates H2, H3 for the disc clutches respectively. This shipper member isprovided with a shipper yoke I it having a suitable operating handle II5conveniently'arranged on the exteriorof the arm frame, as shown in Fig.l.

Splined to the forward extremity of the shaft I05 is a clutch member H6having clutch teeth engageable with clutch teeth II'I formed on theadjacent face of a spur gear H8. The clutchmember H6 is provided with ashipper yoke iii! having a suitable operating lever E20 convenientlyarranged on the exterior of the arm framaas shown in Fig. 1. The spurgear II 8 is journaled on the shaft I 05 and meshes with a spur gear I2Ikeyed to the rear end of a tubular trans-- mission shaft I22. The shaftI22 is arranged with its axis alined with, and surrounds, thetransmission shaft 65, and is simila jcurnalecl within the revolvingcutter head support 4. As shown in Figs. 6 and '7, keyed to the forwardend of-this tubular shaft I22 is a spur gear i23 meshing with a spurgear I2 2 keyed to the rear end of a screw shaft I25. This screw shaftis arranged parallel with the transmission shaft 55 and is suitablyjournaled on the side of the revolving,

. shaft is a sliding nut I25 guided in a guideway I21 extendinglongitudinally of the revolving support. The nut I26 is in the form of asliding trunnion block, and. as shown in Fig. 8, pivotally connected totrunnion pins I28 formed integral with the nut are links I29, I29, inturn pivotally connected at their forward ends at IE5 within projectinglugs I3I formed integral with the swingable cutter support 5. As shownin Figs. 6 and '7, the frame I5 of the swingable cutter support isprovided with trunnions I32, I32 journaled in bearing sleeves I33supported within trunnion supports I34, herein formed integral with thesupport 45 at the forward end of the revolving support 4, thesetrunnions forming a mounting for the cutter supports, whereby the lattermay be swung with respect to the revolving support on the pivotal axisI3. It will thus be seen that, depending upon which of the disc clutchesI08, I09 is applied, and when the clutch II 6. is connected, the cuttersupport 5 may be swung in one direction or the other on its pivotal axisI 3 by the screw, nut and link mechanism I25,

4 and 12, the hub of the gear I38 is formed withan eccentric portion I39on which is journaled. on roller bearings I49, a drive ring MI. Securedby bolts I42 to the frame of the arm structure 3 is a guide ring I48having a series of radially located chambers I44 in which are'guidedradial plungers I45. The ring I4I engagesinsliding abutting relation,with the innerendsof the plungers 545, and the outer ends of theseplungers are provided with tooth-shaped portions engageable with teeth Mformed on a ring I41 secured to the revolving support 4. The frame. I41is journaled in the bearing sleeve I49 supported in a circular frameportion I49 formed integral with the arm structure frame; This'cam andplunger mechanism forms what may be termed a helio- I centric orcontinuous wedge speed reducing mechanism. Thus it will be seen'thatwhen the gear I36 is connected by the clutch H6 in driving relation.with the shaft '63 andone or theother of the disc clutches I99, I89 isapplied, the revolving support 6 may be rotated with respect to the armstructure through the'gearing I39, I38

and the eccentric and sliding plunger mechanism 7 I39, I45 and M6.

each passing through a stufling box I54 carried The mechanismforswinging the turntable frame horizontally relative to the base andfor swinging the arm structure 3 vertically with respect to the swingingframe :will now be described. Referring first to the arm swingingmechanism, it will be noted that pivotally connected at I 58 to theopposite sides of the depending frame portion II of the swinging frame,and arranged at opposite sides of the arm struc ture, are verticallyswingable cylinders I5I having reciprocable therein pistons I52. Thesepistons have upwardly projecting piston. rods I53 within the head I55 ofeach of the cylinders, and these piston rods are pivotally connected attheir outer extremities, at I56, within projections I51 formed integralwith the arm structure frame. .It will thus'be seen that when liquidunder pressure is supplied to one end or the other of the cylinders, thepistons are reciprocated either outwardly or inwardly, thereby to effectswinging of the arm structure 3 either upwardly or downwardly on itspivotal axis I2. By suitably controlling the liquidwithin the ends ofthe cylinders, the pistons may be locked in any desired. position,thereby to maintain the arm structure in any desired position ofadjustment.

The improved mechanism for swinging the turntable frame 2 horizontallywith respect to the 1 base comprises, as shown in Fig. 17, horizontalswingable cylinders I58 and I 59 each pivotally connected at one end, atI69, to a pin I6I suit-.

ably supported within the frame 2. Reciprocable within each of thecylindersisa piston I62 hav- 1 ing a piston rod I63 passing through asuitable stuffing box I64 carried by the cylinderrhead I65.

,apeaers I25, I29. The threads of thescrewl25 are selflocking so thatwhen the swinging mechanism is ,One piston :rod is pivotally connectedat. I66 to a pin lfil supported Within an arcuate frame I68,

'whilethe other piston rod is connected by a similar pin 169 to theopposite end of the arcuate frame 468. vThe top and bottom surfaces ofthis 7 arcuate frame are guided within bearing ele- 'ments. I and I'llwithin arcuate guideways I12 and I13 formed in the top portion of thetruck 7 frame Band an upper detachable plate I forming a portion of theturntable frame; This arcuate guide frame is movable in an arcuate pathstruck from the'axis of the turntable, and carries .a plurality of,herein three, pinions I16 journaled I sides of these pinions I16 alsomesh with the teeth Jof an arcuate rack I86 formed on a segmental.frameportion IBI of the turntable casting. The

pitch circles of the teeth of the'arcuate racks I18, I80 arestruck fromthe axial center of the turntable.

When liquid under pressure is supplied to the cylinders -I58,;I59 'at,one sided one piston and at the opposite side of the other, the arcuateframe I69 is moved arcuately within its guideways, moving the pinionsI19 therewith. The teeth of these pinions reacting on the teeth of thearcuate irack' I18 cause the pinions to 'rotate, thereby effectingarcuate movement of the rack I89, turning therewith the turntable frameand swinging the latter about its axis with respect to the base. :Whenliquid under pressure is supplied to theopposite sides of the pistons,the

parts are of course moved in the opposite direction, thereby swingingthe turntable frame in the opposite direction. Upon trapping liquid inthe cylinders at opposite sides of the pistons, the pistonsmay belocked; thereby to, hold the turntable in its r adjusted position.The-liquid supply and controlling connections for the turntable rotatingand arm swinging cylinders will later be described;

Now referring to the propelling mechanism for the apparatus, it willbenoted that keyed to the shaft 5|, as shown in Fig. 3,'are spur gearsI85,

I86, and as shown in' Fig. 14 the gear I86 meshes with a spur gear I81suitably j ournaled on a.

. these terminal elements are selectively connectible to the shaft I88by multiple disc clutches I9I, I92. These clutches are provided withsuitable operating mechanism including a ballbearing operating memberI93 surrounding the shaft 7 I88 between the gears I81, I" and having asuitable'shipper yoke I94. This shipper ,yoke is provided with. asuitable hydraulic operating means, as will later be described. Theshaft I88 is connected by a clutch I95 to an alined tubular shaft I96,similarly suitably'journaled within I the truck frame. Extendingcentrally through truck frame, and splined to the forward end of .thisshaft is a clutch member I98 having clutch crating piston 23'}, theshipperyoke may be swung teeth I99 connectible to clutch teeth 269formed to'apply either the. clutch I 9I or the clutch I92.

on the forward end of the tubular shaft I96. This clutch member I98 isalso provided with clutch teeth 2M engageable with clutch teeth 292formed on a rotatable member 203. There is provided between the shaftI96 and the rotatable member 263 a substantial speed reduction, and thespeed reduction mechanism is herein of the heliocentric orcontinuous-wedge type, similar $170 that described above in regard tothe rotating .able nwith teeth ,2II formed on the rotatable member 203.It will, thus beseen that when the shaft 195 is rotated,v the rotatingmember 203 is driven-therebyat a substantially reduced speed.

Keyed to the rear end of the shaft I91 is a bevel gear 2I2 meshing witha bevel gear 2I3 keyed-to a'horizontal shaft 2I4 extending transverselyof tric reduction mechanism I39, I45, I46, thereby to propel theapparatus at a relatively low speed.

suitable for cutting. By applying one or the other are connected througha conduit 256 to the reserand suitably journaled within the truck frame.Keyed to anddriven by this shaft is a chain sprocket 2I5 connected by anendless chain 2I6 to a chain sprocket 2I.'I keyed to the rear truckwheel axle. The front andrear truckwheel axles areconnected in drivingrelation by a chain and sprocket connection 2I8., There is provided atruck wheel brake comprising a brake drum. 2I9

keyed to the forward end of the transmission shaft I91 of the truckpropelling mechanism, and cooperating with this drum is a usualcontractible' brake band 220 having suitable operating connections 22 I(see Fig. 1) having'an operating lever 222 conveniently arranged at oneside of the truck frame. Adjacent the control lever 222'is a controllever 223 connected through suitable operating connections 224 to aclutch shipper yoke 225 for the clutch member I98." From the foregoing,it will be evident that when the clutch teeth I99 are connected tothe'clutch teeth 206 and the drive shaft I96 is connected tothetransmission shaft I9'I, the latter may be driven directly from'th'eshaft I96 at a relativelyhigh speed, 7

thereby to effect propulsion of theapparatus along the mine trackway at.a relatively high transport speed. When the clutch teeth 20I .are

connected to the clutch teeth 202, the transmission shaft I91 may bedriven from the shaft I96 at a relatively low speed through the heliocenof the disc clutches I9I, I92, the truck wheels may be driven in eitherof opposite directions at either a high or a low:speed. V

devices, as shown most clearly in Fig.'19,it;will be noted that foroperating the disc clutches I9I; I92 there is provided a cylinder 230,havin'g re- 235, 235 are provided for normally maintaining the shipperyoke in its central or neutral position.

It'will be evident that when liquid under pressure.

is supplied to one side or the other of the op Nowreferring to thevarious hydraulic control;

As shown most-clearly in Fig; -3, thereis secured to the top plate I'I5of the turntable casting a vertical cylinderrnember 236 havingreciprocable therein a. piston 231 secured to a verticallyv reciprocableplunger 238. This plunger is provided with a recess 239 for receiving asuitable jack bar,

so that-when hydraulic pressure is supplied beneath the jack piston 231the jack barmay be moved into engagement with the mine roof forjacking-the apparatus in; position on the mine trackway, thereby to holdthe apparatus steady.

during theswinging operation of the kerf cutter. Liquidi-under pressureis adapted to be sup plied1to the cylinders of, the turntable rotating,

arm swinging, and clutch and jack operating devices, from a gear pump240 of a-well known commercialdesign, driven by a spur gear-24lkeyed;

to the transmission shaft 58 and meshing with the pump driving gearconnected to one of the pump rotors. As shown in Fig. 3, thispump 240 isarranged within a chamber 243 formed in the turntable casting, andthischamber herein forms a reservoir for the liquid for the hydraulicsysterm. This pump is adapted to pump liquid under relatively highpressure through suitable conduits to the various hydraulic devicesunder the control of a master control valve 244 of a well known type,while similar control Valves 245, 246, 241' and 248 are provided forcontrolling the liquid supplied under the control of the master valve244 to the-various hydraulic cylinders and the discharge from thelatter. These supply and discharge control valves are-arranged withinvalve boxes secured to one side of the swingable turntable frame,as'shown in Fig; 1, and are each provided with a suitable controlhandle; these valves being conveniently located so that as the rearendof the truck during transport about the mine may'co-ntrol turntablerotation, arm swing,

leading to the intake of the pump 240. The discharge side of this pumpis connected through a conduit 254 to the bottom of the'master valve 244and is adapted to flow under the control of the master valve, through aconduit 255, to the valve chambers at the lower endsiof the controlvalves 245, 246, 241 and 248. The return pipes of the various hydrauliccontrol devices voir 243. The chamber for the valve 245 is connected bya conduit 25! to thelower end of the piston 231 of the 'jack cylinder236, while the V valve chamber for the valve 246'is connected,

through a flexible conduit 258, to the forward end of the clutchoperating'cylinder 230, and through a flexible conduit 259to the rearend of the clutch operating cylinder. The chamber for the valve 241 isconnected, through a flexible conduit-.260, to a conduit 26I' connectedto the upper ends of the arm swing cylinders I5I, and through aflexible'conduit 262 to a conduit 263- connected to the lower ends ofthearm' swing nected through a conduit 264to a flexible conduit 265communicating with a conduit266 connected to theopposite endsrespectively of the turntable swing-cylinders I58, I59,'a'nd through a.flexible conduit'261- to a conduit 268 connected t'o the duits 215,214and 25%.

proved mining, apparatus is as follows.

otherends of the turntable swing cylinders. 1 The chamberfor the controlvalve 2491s connected bya conduit 269 to the conduit261, and through aconduit 2-10 to the conduit 265. The chamber for the valve 250-isconnected through a conduit 7 2H to the conduit 258, and through aconduit 212 to? the conduit 259. The chamber for the valve 25! isconnected through a conduit 213, to a conduit 214' also communicatingwith this valve chamber and the latter conduit is connected to theconduit 256, while liquid under pressure is supplied to-thelower ends ofthe valve chambers througha conduit Z'Idoommunioatihg with the supplyconduit 255. V 7

When the master valve 244 is in the open position'showm'liquid underpressure may be supplied to the inlet of the pump 240- through condint-252; past the'valve 244,-andthrough the *conduit 253; while liquid underpressure may be conducted from the discharge side of the pump throughconduit 254, past the valve 244',

and through conduit 255 to the valve chambers at the lower ends of thevalves 245,246,251 and 248. When these valves are 'inthe position shown,liquid under pressure flows past the valve- 245 through consume-1 toeifect' operation'of the jaokpiston 231 and liquid under pressure alsoflows past the valve 246, through conduit 259 to one side'of the clutchoperating piston 23I, the other side of the clutch operating piston atthis time being connected to the reservoir, through conduits 258 and256. Liquid under pressure also flows past the valve 248through-conduits264, 265 V and 266 to'the turntable swing cylinders, thedis-. a charge from these cylinders being connected 7 through conduits258, 261 and 256 to the reservoir. At this time the valve 25I is open,so that liquid under pressure by-passes through con When the valves 245,246, 24 I and 248' are turned into reverse position,

the hydraulic devices are operated in the re verse direction. Thesevalves also may of-course berotated'into closed position, thereby to cutoff all liquidfl'o w to the various hydraulic devices]:

Whenthevalves 245, 246, 24! and'248 are closed and'it is; desired-tocontrol the.turntable rotationand truck drive from the rear end' of thetruck, the liquid' discharge fromthe valve 25! may be-closed'and theValves 24-9 and 256 oper-, atedto supply liquid under pressure to theturnmission mechanism driven by the motor 41 and 'in'cludingthetransmissionshaft gearing. I85,

I90 and I86, I81 of the reversing mechanism under the'control of thedisc clutches IN and I92, shaft I96, clutch 198,.transmission shaft I91,bevel gearing 2.I2, 2.!3, shaft 2M and the chain and sprocketconnections 2I5', 2I6',2I'I,

During transport of the. mining apparatus about the mine, the armstructure .3, revolving fcutter' head support 4, andkerf; cutter I5 aredisposedlintheposition indicatedin full'lines in $099,373 v cylinders.-The chamber for the valve 248 isco n Fig. 2, and during transportthe'operator seat ed on therear left-hand side of the truck frame,- atthe rearof the electrical control apparatus The control valves 249, 25Band '25 are located within easy reach of the operator, so that the valve249 controlling turntable swing and the valve'250 controlling the discclutches I9! and I92 may be adjusted as desired, it beingnecessary attimes to swing the turntable, together a with the arm structura'back andforth with respect to the truck to enable the apparatus to pass aroundcurves in the mine passages. When the working face is reached, the highspeed truck wheel drive is disconnected from the'motor by releasing thedisc clutch and the clutch I92.

If itis desired to make a'horizontal cut at or 'near the level of themine floor, outside and below the level of the mine trackway' and inadvance of the trackway, in accordance with'the well known arcwallmethod, the operator releases the rotatablekerf cutter locking pin 88,thereby freeing the kerf cutter so that the latter may be swung from thefull-line positionshown'in Fig. 2 to the full-line positionshown inFigfl, wherein the kerf cutter extends forwardly lengthwise of thearm'structure with respect'to. its pivot. The kerf cutter is then lockedin po'sitionby'the locking pin 88. The operator then applies one-or theother of the disc clutches M1,!!! and shifts the clutch member M6 toconnect the gear I36 to the transmission shaft [35 so that the revolvingsupport lmay be rotated'in one direction or the other about itsaxis'with respect to the arm structure until the kerf cutter assumes ahorizontal position beneath the support. The clutches I01, I138 are thenreleased. Liquid under pressure is then supplied to the turntable swingcylinders I58, I59 under the control of the valve 248 thereby causingthe turntable, together with the cutting mechanism supported thereby, tobe swung horizontally from the central full-line position shown'in-Fig.'1 to a positicn wh'erein the pivot of thekerf'cutter lies outside thetrackway.

'I'he kerf cutter locking pin5'88 may be released, and connected'todifferent notches 8650 that any mechanism I5I, I52 under thefcontrol ofthe valve 241, the arm structure and cutter supportswingingfsim'ultaneously about their pivots'in opposite directions untilthe parts assume the lower in1Fig.. 2,:with the kerf cutter near thelevel of the mine floor. a

'When the tip end of the. kerf cutter liesr adjacentthe coal-face at theright-hand rib, the operator shifts the clutch 66 to connect thetransmissionshaft'lifi to the shaft 63, thereby to conneot. the cutterchain of? the kerf cutter to its drive; thereby to cause the cutterchain to circulatev rapidlylabout the margin of the cutter bar; Theturntable swing control valve 248 is thenclosedythereby; tolockhydraulically the pistons Within the cylinders to hold theturntable; against rotative'movement with respect to the truck. Thevaperaton then shifts] the clutch.

60 bottom cutting position indicated in dotted lines 7,

I93 into a position to connect the rotatable mem ber 29-3 to the shaftIsl, thereby effectingtruck wheel drive through the heliocentric speedreducable for cutting, to effect vsumping of the kerf cutter beneath thecoal face. Upon completion of. the sumping cut, the clutch Hill isreleased and the truck wheel brake H9, 228 set to'hold the truck wheelsstationary. Y

The turntable swing control valve 248 is then operated to supply liquidunder pressure to the swing cylinders I58, I59, thereby to effect swing,

ing of the turntable and adjustableyarm structure about'the axis of theturntable laterally from right to left, thereby to swing.- the kerfcutter 1 from a point adjacent the right-hand rib laterally across thecoal face to'a point adjacent the left-handv rib; the valve24B-thereafter being adjusted to lock the turntable against rotation.The brake 2E9, 226 is then released, the clutch 698 connected to therotatable member 203, and the truck wheels arev driven at a relativelylow speed suitable for cutting, to propel the apparatus rearwardly alongthe mine trackway to effect withdrawal of the kerf cutter-from'beneaththe coal.

- A horizontal kerf may be cut at or near the level of the mineroof byapplying one or the other of the disc clutches I01, I88 and shifting theclutch member H6 to connect the gear I36 to the transmission shaft I05,thereby to effect rotation of the revolving cutter head 4 to swing thekerf cutter about the support axis from the bottom cutting positionshown in Fig.2 to the top cutting position indicated in dotted lines inthat figure. The arm structure and cutter support are swung about theirrespective pivots to adjust the kerf cutter into the upperdotted-lineposition shown in Fig. 2. The kerf cutter is then swung to aposition adjacent the right-hand rib,

sumped in, swung transversely across the face,

and thereafter withdrawn from the coal, in accordan'ce with the usual.arcwall method of cutting.

It will be noted .that during any of thehori if it is desired to tiltthe tip end of the kerf cutter upwardly or downwardly, this may beaccomplished by swinging the cutter support 5 about its pivotal axis I3with respect to the -re-' volving support; while if it is desired to tipthe k'erf cutter edgewise, the revolving support may be rotated aboutits axis.

A shear or vertical cut may be inserted in the coal face by applying oneor the other of the disc clutches H01, H33 and shifting the clutchmember lit to connect the gear 136 to the transmission shaftll5,'thereby to effect rotationof the revolving support 4 with respectto' the structure to bring the kerf cutterinto a position to swingvertically. The kerf cutter is swung upwardly in a vertical plane byswinging the arm structure 3 about its pivot l2 under the control of thehydraulic Cylinders [5! until the tip end of the kerf cutter assumes aposition adjacent the mine roof. The apparatus is 'then' propelledforwardly along the trackway at a slow'speed to sump the kerf cutterwithin the coal. Thereafter, the arm structure 3 is swung downwardlyabout its pivot l2 to enact swinging of the kerf cutter about the pivotl2 to effect its; swinging cut, the kerf cutter swinging down wardlyuntil its tip end reaches the mine floor. The kerf cutter is thenwithdrawn from the coal by movement of the apparatus rearwardly alongthe trackway at a low speed.

It will further be noted that by rotating the turntable andsimultaneously swinging the cutter support about its pivot [3 the kerfcutter may be positioned to cut vertical kerfs at any desired locationbetween the center of the entry and either rib, one shearing positionbeing indicated in dotted lines in Fig. 1. When the parts are in thedotted-line position shown in Fig. 1, with the kerf cutter arranged atone side of the center of the entry, the arm structure may be swungupwardly to position the tip end of the kerf cutter at'the roof, and theapparatus may then be propelled bodily along the trackway to effectsumping of the kerf cutter within the coal face. After the completion ofthe sumping cut, the arm structure may be swung downwardly to move thekerf cutter in an arcuate path about the arm structure axis l2 to cut anupright, slightly curved kerf in the coal face from a point adjacent themine roof to a point at the mine floor. Thereafter, the kerf cutter maybe moved rearwardly to effect its withdrawal cut by propulsion of theapparatus bodily rearwardly along the trackway. By swinging the cuttersupport 5 about its vertical pivot Hi from the dotted-line positionshown in Fig. l to an angularly disposedposition, V

with the tip end of the kerf cutter adjacent the left-hand rib, asimilar, upright, slightly curved kerf may be cut in the rib. Byswinging the arm structure laterally to'the opposite side of theapparatus, a similar cut may be inserted in the opposite rib.

It will further be noted that by rotating the revolving support 4 thekerf cutter may be moved through an arc of a circle to shearingpositions at either side of the support axis, this being necessary whenvertical kerfs are cut at opposite ribs. During any of the cuttingoperations above described, the truck is maintained in position on thetrackway during swinging movement of the kerf cutter, by the hydraulic,roof engaging jack mechanism 231, 238 controlled by the valve 245.

As a result of this invention it will be noted that an improved coalmining apparatus is provided, having improved adjustable kerf cuttingmechanism whereby horizontal kerfs may be cut at or near the level ofthe mine floor, either in front or outside and below the level of themine trackway, horizontal kerfs at any desired location between the mineroof and mine floor, and vertical kerfs atany desired location betweenthe ribs of the entry. Itwill further be noted that by the provision ofthe improved adjustable sup modate itself to a rolling or uneven flooror pitching coal seam. Itwill still further be noted that an improvedcoal mining apparatus is provided wherein the adjusting mechanism forthe kerf cutter is extremely flexible and has a wide range ofadjustment, it being possible to locate the kerf cutter to cut kerfs inthe coal face andl proved mining apparatus will be clearly apparent tothose skilled in the art.

While there'is in this application specifically described one form whichthe invention may as sume in practice, and several methods ofusethereof, it will be understood that thesarneare shown for purposesofillustration and that the invention may be modified and embodied invarious other forms without departing from its spirit or the scope ofthe appended claims;

What I claim as new and desire to secure by Letters Patent is:

1. In a mining apparatus, a portable base, an arm structure pivotallymountedon saidbase to swing in a vertical direction relative thereto, acutter support swingably mounted on the outer extremity of said armstructure, a.kerf.cutter. pivotally mounted on said cutter supporttoswing relative thereto, a motor on said base relative to. which saidarm structure is swingable, devices driven by said motor foractuatingsaidkerf cutter including a transmission shaft extending.longitudinally of said arm. structure, and devices driven by said shaftfor swinging said cutter support relative to said arm structureincluding a. screw and nut mechanism parallel with said; shaft.

2. In a mining apparatus, a portable base, an" arm structure pivotallymounted on said'base to swing in a vertical direction relative thereto,a cutter support 'swingably mounted on the outerextremity of said armstructure, a kerf cutter pivotally mounted on said cutter support toswing relative thereto, a'motor on said base re1ativetowhich said armstructure is swingable, devices driven by said motor for actuating saidkerf cutter including a transmission shaft extending. longitudinally ofsaid arm structure, and de-- vices driven by said shaft for swingingsaid cutter support relative to said arm structure including 'a screwand nut mechanism, said screw and nut mechanism including a guideway onsaid arm structure, a screw extending longitudinally of said guideway inparallelism with said shaft, a nut engaging said screw and guided insaid.

guideway, and a link connecting said nut to-f said cutter support.

3. In a mining apparatus, a portable base, an? arm structure pivotallymounted on said baseto. swing in a vertical directionrelativezthereto,.,a cutter support swingably mounted on theoutenextremity of said arm structure, a kerf cutter pivotally mounted onsaid' cutter. support ato swing" relative thereto, a motor oni'saidbaserelative to which said arm structure is swingable,-- devices drivenby said motor for actuatingsaid; kerf cutter including a transmissionshaft'ex-.- tending longitudinally of said arm structure-and devicesdriven by said shaft for: swinging; said.- cutter support relative tosaid armstructure'ine; eluding a screw and nut mechanism; said .screwand nut mechanism including a guideway on said arm structure, a screwextending longitudinally of said guideway in parallelism with saidshaft,

a nut engaging said screw and guided in;said, gm'deway and a linkconnecting said nut to said i cutter support, and mechanism forrotatingsaid. screw in either of opposite directions,

4. In a mining apparatus,-a portable base, an

arm structure pivotally mounted on said-base toport, a kerf cuttermounted on said cutter sup.- port to swing relative thereto, motoroperated mechanism for actuating: said kerf cutter includ--. inga;transmission shaft extending longitudinally' of saidarm structure, andmechanism'driven byv said transmissionv shaft and carried by saidrevolvingsupport for swinging said cutter support relative theretoincluding a. screw and nut mechanism'para llel with said shaft, thescrew of the latter mounted on said'revolving support andarranged' w-ithits' axis parallel' with the :axis of said revolving "support androtatable with the latter about the :support axis;

5A In amining -apparatus, a portable base, an

arm structure-pivotal1y mounted on said b'ase to swing in a 'vertical-'directionrelative thereto, 1 .a

revolving-"support"mountedon said arm struc ture torotate relativethereto about :an axis extending longitudinally of -said-arm structure;a"-

cutter: support -swinga'bly mounted on said revolv'i-ng support, a "kerfcutter'mounted on said cutter support to: swing relative thereto, motoroperated mechanism for actuating said kerf cutter including atransmission-- shaft extending; lon'gitudin'all y of said arm structure,and'mech'a nism driven by said transmission shaft :and 'carried by saidrevolving support for swinging. said cutter support relative theretoincluding: a screw and nut mechanism,.- said screw and nut mechanismincluding: guideway extending longitudin'ally of said revolving:support,a screw extending longitudinally of said guidewayin parallelism withsaid :shaf tg a nut engaging: said screw and guided in said guide'wayandia .link -lconnecting said nut with said cutter support. 7

6.1m amining apparatus, a: portable base,-

kerf s-cutting mechanism mounted onisaidcbase forr iswinging. movementrelative. theretopi 'and mechanism forzswinging said. kerfcutting.mech.-. arr-ism .seiectively in; oppositerdirections. relativetmsaid base includinga pair. of. hydraulic cylin der:.:andpistoncdev-ices onnthe base. for' swinging said .k'er'fi cutting.mechanism. and. relative to which devices said..;kei:f cuttingmechanismxis swingable when swung by them, one device extensible toswing-said :cuttingsmechanism inone direction and: theother deviceextensible to" swing-said qcutting, mechanism inethe opposite directionandtfa speed ;multiplying mechanism operatively. :connected :to-sthepistons: of said devices andrsaidqcutting, mechanism, the: latterbeingsswungin opposite: directions by said hy-v drauliccdevices throughsaid; speed. multiplying mechanisms said speedrmuItipIying, mechanism I'including,. a member fixed :to :said -base,- a.-mem--berfixedatosaid-1cutting: mechanism, and a cooperatingirotatable memberengaging said members :and;:to=.which said devices are operativelyconnected.

{7.5 In a miningapparatus, a portable base, kerf cutting mechanismmounted on said: base for swinging,movementrelative thereto andmechanism for swinging sai'd kerf cutting mechanism 7 selectivelyainopposite directions relative to said base-includingaa pair of hydrauliccylinder and piston'devices on said base, one device extensibletoswing-said cutting mechanism in onedimotion and the'bt-her deviceextensible to swing said cutting mechanism in the opposite directionandi anain-terrneshing; rack :and gear a speed multiplying tmechanismoperatively connected to said pistons and said-cuttingmechanism, thelatter being swung in opposite directions by said. devices through: saidspeed rriultiplyingmechanism said speed-multiplying mechanism includinga rack fixed to said base, a rack fixed to said cutting mechanism, and agear meshing with said racks and operatively connected to saiddevicesfor actuation by the latter.

' 8. In a mining apparatus, a portable base, kerf cutting mechanism, andmechanism for swinging said kerf cutting mechanism relative to said baseincluding a pair of hydraulic cylinder and piston devices on the base,intermeshing rack and gear connections between the pistons thereof andsaid cutting mechanism, said connections including an arcuate guide towhich the pistonrods are pivotally connected, a stationary arcuate racksecured to the base, a movable arcuate rack movable with the cuttingmechanism, and a gear carried by said guide and meshing with said racks-9. In a mining apparatus, a portable base, a motor thereon, a horizontalturntable on said base rotatable relative thereto and to said motor,said turntable having an arm portion overlying the forward end of thebase and a depending frame portion projecting downwardly from the outerextremity of said arm portion, an arm structure pivotally mounted onsaid arm portion to swing in a vertical direction relative thereto,connections between the lower end of the depending frame portion andsaid arm for swinging said arm relative to said turntable, a revolvingsupport mounted on said arm structure to rotate relative thereto aboutan axis extending longitudinally of the arm structure, gearing actuatedby power from said motor and carried by said arm structure for revolvingsaid support relative to said arm structure, a cutter support swingablymounted on the outer extremity of said revolving support, and a kerfcutter mounted'on said swingable support to swing relative thereto.

10. In a mining apparatus, a portable base, a motor thereon, ahorizontal turntable on said base rotatable relative to the latter andto said motor, said turntable having an arm portion overlying theforward end-of the base and a dependingframe portion projectingdownwardly from the outer extremity of said arm portion, an armstructure pivotally mounted on said arm portion to swing in a verticaldirection relative thereto,

connections between the lower end of the depending frame portion andsaid arm for swinging said arm relative to said turntable, a revolvingsupport mounted on said arm structure to rotate relative thereto aboutan axis extending longitudinally of the arm structure, gearing actuatedby power from said motor and carried by said arm structure for revolvingsaid support relative to said arm structure, a cutter support swingablymounted on the outer extremity of said revolving support, mechanismcarried by said revolving support for swinging said cutter supportrelative thereto, and a kerf cutter mounted on said swingable support toswing relative there- 11. In a mining apparatus, a portable base, ahorizontal turntable on said base, said turntable .having an arm portionoverlying the .forward end of the base and a depending frame portionprojecting downwardly from the outer extremity of said arm portion, anarm structure pivotally nally of the arm structure, gearing carried bysaid arm structure for revolving said support relative to said armstructure, a cutter support swingably mounted on the outer extremity ofsaid revolving support, mechanism carried by said'revolving support forswinging said cutter support relative thereto, and a kerf cutter mountedon said swingable support to swing relative thereto, said rotating meansfor said revolving support including a heliocentric speed reducingmechanism between said arm structure and said revolving support and saidcutter support swinging means including a screw and nut mechanismcarried bysaid revolving support.

12. In a mining apparatus, a portable base, a support on said base, acutter support pivotally mounted on said support to swing relativethere- I to about an axis at right angles to the longitudinal axis ofsaid first support, a kerf cutter carried by said cutter support, motoroperated means for actuating said kerf cutter including a transmissionshaft arranged with its axis extending longitudinally of said firstsupport at right angles to the axis of swinging movement of said cuttersupport, and means driven by said shaft for swinging said cutter supportwith respect to said first support including a shaft coaxial with androtatable relative to said transmissionshaft during swinging of saidcutter support, and operative connections between said coaxial shaft andsaid cutter support.

13. In a mining apparatus, a portable base, a support mounted on saidbase for rotation with respectthereto about its longitudinal axis; acut-' ter support pivotally mounted on said rotatable support to swingrelative thereto about an axis at right angles to the longitudinal axisof said rotatable support, a kerf cutter carried by said cutter support,motor operated means for actuating said kerf cutter including atransmission shaft arranged with its axis extending longitudinally ofand alined with the axis of rotation of said rotatable support, andmeans driven by said shaftfor swinging said cutter support about itspivot with respect to said rotatable support including a shaft coaxialwith and rotatable relative to said transmission shaft during swingingof said cutter support, and operative connections between said coaxialshaft and said cutter support.

14. In a mining apparatus, a portable base, an arm pivotally mounted onsaid base to swing relative thereto, a support mounted on said arm forrotation with respect thereto about a longitudinal axis extending atright angles to the arm pivot axis, a cutter support pivotally mountedon said rotatable support to swing relative thereto about an axis atright angles to the axis of rotation of said rotatable support, a kerfcutter carried by said. cutter support, motor operated means foractuating said kerf cutter including a transmission element journaled insaid arm, a transmission element driven by said transmission element andarranged with its axis coincident with the axis of rotation of said ro--tatable support, andmeans driven by said last mentioned transmissionelement for swinging said cutter support with respect to said rotatablesupport including a transmission element coaxial with and rotatablerelative to said first mentioned transmission element during swinging ofsaid cutter support, and operative connections between said coaxialtransmission element and said cutter support.

15. In a mining apparatus, a support, a cutter support pivotally mountedon said support to swing relative thereto about an axis at right anglesto the longitudinal axis of said first support, a kerf cutter carried bysaid cutter support,-

motor operated means for actuating said kerf cutter including atransmission shaft arranged with its axis coincident with thelongitudinal axis of said first support within the latter, and" meansdriven by said transmission shaft for swinging said cutter supportrelative to said first support and including a, shaft coaxial with androtatable relative to said transmission shaft during swinging of saidcutter support, and operative connections betweensaid coaxial shaft andsaid cutter support.

16. In 'a mining apparatus, a support, a cutter support pivotallymounted on said support to swing relative thereto about an axis at rightangles to the longitudinal axis of said support, a plane kerf cuttercarried by said cutter support, said cutter support pivot axis arrangedparallel with the plane of said kerf cutter, motor operated means foractuating said kerf cutter including a transmission shaft arranged withits axis coincident with the longitudinal axis of said first support,and means driven by said shaft for swinging said cutter support aboutits pivotal axis relative to said first support to move said kerf cutterinto relatively inclined cutting planes including relatively rotatablethreadedly engaged screw and nut elements arranged with their axesparallel with the longitudinal axis of said first support and mounted onthe latter, means driven by said shaft for effecting relative rotationbetween said screw and nut elements to effect rectilinear movement ofone of said elements, and a connection between said rectilinearlymovable element and said cutter support.

17. In a mining apparatus, a support, a cutter support pivotally mountedon said support to swing relative thereto about an axis at right anglesto the longitudinal axis of said first support, a plane kerfcutter'carried by said cutter support, said cutter support pivot axisarranged parallel with the plane of said kerf cutter, motor operatedmeans for actuating said kerf cutter including a transmission shaftarranged with its aids coincident with the longitudinal axis of saidfirst support, means driven by said transmission shaft for swinging saidcutter support about its pivotal axis relative to said first support tomove said kerf cutter into relatively inclined cutting planes includinga screw arranged with its axis parallel with the longitudinal axis ofsaid first support and journaled on the latter, driving connectionsbetween said shaft and said screw, a nut engaging said screw and movablerectilinearly therealong, and a connection between said nut and saidcutter support.

18. In a mining apparatus, a portable base, but a single rigid armpivotally mounted on said base to swing in a vertical direction relativethereto, a cutter support pivotally mounted on said arm to swingrelative thereto about an axis base to swing in a vertical directionrelative thereto, a support mounted on said arm for rotation withrespect thereto about an axis at right angles to the arm pivot axis, acutter support pivotally mounte on said rotatable support to swingrelative thereto about an axis at right angles to the axis of'rotationof saidfirst support, arkerf cutter carried by said cutter support,motor operated means: for actuating said kerf cutter including a shaftjournaled on said arm, means 'driven by said shaft for rotating saidfirst support relative to said arm, and means driven by said shaft forswinging said cutter support relative to said first support saidrotating and swinging means for said supports including a shaft parallelwith said shaft and likewise jourinaled on said arm.

20. In a mining apparatus, a portable base, an arm pivotally mounted onsaid base to swing in a vertical direction relative thereto, a supportmounted on said arm for rotation relative thereto about an axis at rightangles to the arm pivot axis, a cutter support pivotally mounted on saidrotatable support to swing relative thereto about an axis at rightangles to the axis of rotation of said rotatable support, a kerf cuttercarried by said cutter support, motor operated means for actuating saidkerf cutter including shafting journaled'in said arm and said rotatablesupport centrally within the latter, means carried by said arm anddriven by said shafting for rotating said first support relative to saidarm, and means carried by said first support and driven by said shaftingfor swinging said cutter support relative to said first support, saidcutter support swinging means including cooperating relatively rotatableswinging members having relative rectilinear movement upon relativerotation thereof and means for effecting relative rotation of saidmembers.

21. In a-miningapparatus, a portable base, a horizontal turntable onsaid base, cutter adjusting meansmounted on said turntable, hydraulicdevices for rotating said turntable, for adjusting said cutter adjustingmeans and for controlling base propulsion, control means for saidhydraulic devices located at theforward' end of said base at one side ofsaid turntable, and auxiliary control means for controlling saidhydraulic turntable rotation device and said base propulsion controllingdevice and located on said base at the rear of said turntable. V

22. In a mining apparatus, kerf cutting mechanism mounted for swingingmovement, and swinging mechanism therefor for swinging the cuttingmechanism in opposite directions including a pair of hydraulic cylinderand piston devices relative to which, upon actuation by said devices,said cutting mechanism is swingable, one device extensible to swing saidcutting mechanism in one direction and the other device extensible toswing said cutting mechanism in the opposite direction, and a speedmultiplying means common to both hydraulic devices and operativelyconnected between said hydraulic devices and said cutting mechanism forswinging the latter a distance substantially greater than the distanceof piston travel with respect to the cylinders, said speed. multiplyingmeans comprising a member movable about the axis of swing of saidcutting mechanism, an actuating member carried thereby, and a memberalso movable about said axis of swing and actuated by said actuatingmember. V 23. In a mining apparatus, kerf cutting mechanisrn mounted forswinging movement, and swinging mechanism therefor for swinging thecuttingmechanism inthe opposite directions including a pair of hydrauliccylinder and piston devices relative to whiclnupon actuation by saiddevices, said cutting mechanism is swingable, one

said cutting mechanism, said speed multiplying means embodying a movableelement to which the pistons of said devices are both connected and anactuating member carried by and rotatable relative to said movablemember. I

24. In a mining apparatus, kerf cutting mechanism mounted for swingingmovement, and swinging mechanism therefor for. swinging the cuttingmechanism in the opposite directions including a pair of hydrauliccylinderand piston devices, one device extensible to swing the cuttingmechanism in one direction and the other device extensible to swing thecutting mechanism in the opposite direction, a speed multiplying meanscommon to both devices and operatively connected between said hydraulicdevices and said tween said stationary and movable elements inan arcuateguide to which the pistons are pivotally connected, a stationary arcuaterack, a movable arcuate rack, and a gear carried by said arcuate guideand meshing with said racks.

26. In a mining apparatus, kerf cutting mechanism, and swingingmechanism therefor including a hydraulic cylinder and piston device,

intermeshing rack and gear connections between;

the piston of said device and said cutting mechanism, said connectionsincluding an arcuate guide to which the piston is connected, astationary arcuate rack, a movable arcuate rack, and agear carried bysaid arcuate guide and meshing with i said racks.

27. In a mining apparatus, a portable base, a horizontal turntable onsaid base, cutter adjusting means mounted on said turntable, devices forrotating said turntable, for adjusting said cutter adjusting means andfor controlling base propulsion, control means for said devices locatedat the forward end of said base at one side of said turntable, andauxiliary control means for controlling said turntable rotation deviceand said base propulsion controlling device and located on said base atthe rear of said turntable.

28. In a mining apparatus, a portable base, an arm structure pivotallymounted on said base to swingin a vertical direction relative thereto, acutter head mounted on said arm structure for rotation about an axisextending longitudinally 1 'of the arm structure, a 'kerf cutter carriedby said cutter head, mechanism for actuating the kerf cutter including atransmission shaft arranged longitudinally of said arm structure withits axis coincident with the head axis, and means driven by said shaftfor rotating said cutter head including a shaft' arranged parallel withsaid transmission shaft and mounted on said arm structure, and speedreducing means operatively connected between said parallel shaft andsaid cutter head and including cooperating relatively rotatable speedreducing elements arranged with,

its axis coincident with the head axis, and means driven by saidtransmission shaft for rotating said head, selectively in either ofopposite directions including a shaft arranged on said arm structure inparallel relation with said transmission shaft, reversing mechanismbetween said transmission shaft and said parallel shaft for effectingrotation of said parallel shaft selectively in either of oppositedirections while said transmission shaft rotates continuously in thesamedirection, and speed reducing means operatively connectedbetween-said parallel shaft and said cutter head including relativelyrotatable speed reducing elements arranged coaxially with saidtransmission shaft with their axes coincident'with the cutter head axis.

30. In a mining apparatus, a portable base, an 1 arm structurepivotally, mounted on said base to swing in a vertical directionrelative thereto, a cutter head mounted on said arm structure forrotation about an, axis extending longitudinally of the arm structure, acutter support pivotally mounted on said cutter head to swing relativethereto about an axis at right angles to the head axis, a kerf cuttercarried by said cutter support, means for actuating said kerf cutterincluding a transmission shaft extending longitudinally of said armstructure with its axis coincident with the cutter head axis, and meansdriven by said transmission shaft for rotating said outter head andswinging said cutter support about its pivot including a shaft parallelwith said transmission shaft, gearing connecting said parallel shaftwith said transmission shaft, speed reducing means operativelyconnecting said parallel shaft with the cutter head, means including ashaft coaxial with said transmission shaft for transmitting swingingmovement to said cutter support, and gearing connecting said parallelshaft with said coaxial shaft.

31. In a mining apparatus, a support, a cutter head rotatably mounted onsaid support, a cutter support pivotally mounted on said cutter head toswing relative thereto about an axis at right angles to the head axis, akerf cutter carried by said cutter support, means for actuating saidkerf cutter including transmission shafting extending axially along thehead axis through the cutter head, a shaft coaxial with said shaftingand carried by said first mentioned support, means driven by saidshafting including a head rotating element surrounding said coaxialshaft and operatively connected to the cutter head for rotating thelatter relative to said first mentioned support, and means driven bysaid shafting including a driving element secured to said coaxial shaftand cutter support-swinging means actuated by the latter for swingingsaid cutter support relative to said cutter head.

with its axis extending longitudinally of saidfirst support at rightangles to the axis of swinging movement of said cutter support, andmeans including reversing gearing on said vertically swingable supportand'driven by said shaft for swinging'said cutter support. in either ofopposite direotions with respect to said first support without reversingthe direction of drive of said kerf cutter.

33. In a mining apparatus, a portable base, a'

support 'mounted on. said base for rotation with respect thereto aboutits longitudinal axis, a cutter support pivotallymounted on saidrotatable support to swing relative thereto about an axis at rightangles to the axis of rotation of said first support, a kerf cuttercarried by said cutter support, said cutter support swingable about itspivot relative to said first support to move said kerf cutter intorelatively inclined cutting planes, motor operated means for actuatingsaid kerf cutter including a transmission shaft arranged with its axisalined with the axis of rotation of said first support, and means drivenby said shaft for swinging said cutter support in either of oppositedirections about its pivot withrespect to said first support without'reversing the direction of drive of said kerf cutter;

34. In a mining apparatus, a vertically-swingable support, a cuttersupport pivotally mounted on said first support to swing relativethereto about an axis at right angles to the longitudinal axis of saidfirst support, a kerf cutter carried by said cutter support, said cuttersupport swingable about its pivotrelative to said first support to movesaid kerf cutter into relatively inclined cutting planes, motor operatedmeans for actuating said kerf cutter includinga transmissionshaft'arranged with its axis coincident with the longitudinal axis ofsaid first support within the latter, and means driven by saidtransmission shaft and including reversing gearing carried by said firstsupport for'swinging said cutter support in either of oppositedirections relative to said first support without reversing thedirection of drive of said kerf cutter;

35. In a mining apparatus, a portable base, an

arm pivotally mounted on said base to swing in a port pivotally mountedon the outer, extremity of said arm to swing relative thereto, a kerfcutter carried by saidcutter support, motor operated means for actuatingsaid kerf cutter including a transmission shaft arranged with its axisextending longitudinally of said arm, and means for swinging said cuttersupport about its pivot in"- cluding a shaft parallel with saidtransmission shaft and journaled on said arm, ashaft coaxial with androtatable relative to said transmission shaft, driving connectionsbetween said transmission shaft and said parallel shaft and between saidparallel shaft and said coaxial shaft and operative swinging connectionsbetween said coaxial shaft and said cutter support.

36. In a mining apparatus, a portable base, an arm pivotally mounted onsaid base to swing in a vertical direction relative thereto, a cuttersupport pivotally, mounted on the outer extremity of said arm to swingrelative thereto, a kerf cutter carried by said cutter support, motoroperated means for actuating said kerf cutter including a transmissionshaft arranged with its axis extending longitudinally of said arm, andmeans for swinging said cutter support about its pivot including a shaftparallel with said transmission shaft and journaled on said arm, a shaftcoaxial with and rotatable relative to said transmission shaft, drivingconnections between said transmission shaft and said parallel shaft andbetween said parallel shaft and said coaxial shaft and operativeswinging connections between said coaxial shaft and said cutter supportincluding a fourth shaft parallel with said coaxial shaft.

3'7. In a mining apparatus, a portable base, an arm pivotally mounted onsaid-base to swing in a vertical direction relative thereto, a cutterhead mounted on said arm for rotation about an axis alined with thelongitudinal axis of said arm, a cutter support pivotally mounted onsaid cutter head to swing relative thereto about an axis at right anglesto the head axis, a kerf cutter carried by said cutter support, motoroperated means for actuating said kerf cutter including a transmissionshaft arranged with its'axis alined with the longitudinal axis of saidarm, and means driven by said transmission shaft'for rotating saidoutsaid parallel shaft and said rotatable head, said driving gearingincluding a gear arranged with its axis alined with the cutter head axisand rotatable relative to said cutter head during head rotation.

38. In a mining apparatus, a swingable support, a cutter head mounted onsaid swingable support for rotation about an axis extendinglongitudinally of said swingable support, a cutter support pivotallymounted on said cutter head to swing relative thereto about an axis atright angles to the head axis, a kerf cutter carried by "said cuttersupport, motor operated means for driving said kerf' cutter including atransmission shaft arrangedwith its axis alined with the longitudinalaxis of said swingable support, means driven by said shaft for rotatingsaid cutter head including a shaft parallel with said transmission shaftand journaled on said swingable support, driving connections betweensaid transmissionishaftand said parallel shaft and drivingconnectionsbetween said parallel, shaft and said cutter head, and meansfor swinging said cuttersupport about its pivot including a shaftcoaxial with'and rotatable relative to said transmission'shaft, drivingmeans between said parallel shaft and said coaxial shaft, and operativeconnections between'saidcoaxial shaft and said cutter support.

39. In a mining apparatus, a swingable support, a cutter head mounted-onsaid swingable support for rotation about an axis extendinglongitudinally of said swingable support, a cutter support pivotallymounted on said cutter head to swing relative thereto about an axis atright angles to the 'head axis, a kerf cutter carried shaft coaxial withandrotatable relative to said by 'saidcutter support, motor operatedmeans for driving said kerf'cutterincluding 'a transmission shaftarranged with its axis alined with the longitudinal axis of saidswingablfe support,

means driven by said shaft for rotatingsaid cutter head including ashaft parallel with said transmission shaft and journaled on-saidswingable support, driving connections between said transmissionshaft'and said parallel shaft and driving connections betweensaidparallel shaft and said cutter head, and means for swinging said cuttersupport about itspivot including a transmissionshaft, driving meansbetween said parallel shaft and said coaxial shaft, and operativeconnections between said. coaxial shaft and said cutter support, andclutch means for 'selectively connecting said head rotating connectionsand said'cutter support swinging connections in driving relationwithsaidparallel shaft.

40. In a mining apparatus, a swingable support, a cutter head mounted onsaid swingable support for rotation about an axis extendinglongitudinally of said swingable support, a cutter support pivotallymounted on said cutter head to swing relative thereto about an axis atright angles to the head axis, a kerf cutter carried by said cuttersupport, motor operated means for driving said kerf cutter including a'transmission shaft arranged with its axis alined with the longitudinalaxis of said swingable support, means driven by said shaft for rotatingsaid cutter head including a.shaft parallel with said reversing gearingfor effecting head rotation and.

cutter support swing in 'either of opposite directions while saidtransmission shaft rotates continuously in the same direction,

41. In a mining apparatus, a portable base, a support on said base, acutter support pivotally mounted on said first support to swing relativethereto about an axis at right angles to the longitudinal axis of saidfirst support, a kerf cutter carried by said cutter support, motoroperated means for actuating said kerf cutter including a transmissionshaft arranged withits axis extending longitudinally of said firstsupport at right angles to the axis of swinging movement of said cuttersupport, and means driven by said 3 shaft for swinging said cuttersupport in either of opposite directions with respect to said firstsupport including a shaft coaxial with and rotatable relative tosaidtransmission shaft, a reversing mechanism between said transmissionshaft and said coaxial shaft for rotating the latter selectively inopposite directions while said transmission shaft rotates always in thesame direction, and operative connections between said coaxial shaft andsaid cutter support.

42. In a mining apparatus, a support, a cutter support pivotally mountedon said support to swing relative thereto about an axis at rightangles'to the longitudinal axis of said first support, a kerf cuttercarried by said cutter support,

motor operated me'ans for actuating said kerf cutter including atransmission shaft arranged with its axis coincident with thelongitudinal axis of said first support within the latter, and meansdrivenby said transmission shaft for swinging,

said cutter in either of opposite directions relative to said firstsupport and'including a shaft mission shaft, reversing mechanism betweensaid transmission shaft and said coaxial shaft, and

operative connections between said coaxial shaft and said cuttersupport.

43. In a mining apparatus, a support, a cutter support swingably mountedon said support, a kerf cutter pivotally mounted on said cutter supportto' swing relative thereto, motor operated devices for actuating saidkerf cutter including a transmission shaft extending longitudinally ofcoaxial with and rotatable relative to said transsaid first support, anddevices driven by said transmission shaft for swinging said cuttersupport relative to said first support including a screw and nutmechanism parallel with said transmission shaft.

44. In a' mining apparatus, a portable base, kerf cutting mechanism onsaid base, and mechanism for swinging said kerf cutting mechanismselectively in opposite directions relative to said base including apair of hydraulic rams pivotally mounted on said base to swinghorizontally relative thereto, one ram extensible to swing said cuttingmechanism in one direction and the other ram extensible to swing thecutting mechanism, in the opposite direction, and a speedmultiplyingmechanism operatively connected to said ramsand said cutting'mechanism, said speed multiplying mechanism including means to V whichsaid rams are pivotally connected on axes parallel to the axes ofswinging movement of said opposite directions relative to said baseincluding I a pair of hydraulic cylinder and piston devices arranged onsaid base below the top of said turntable and relative to which thelatter is r0- tatable, one device extensible to rotate said turntable inone direction and the other device extensible to rotate said turntablein the opposite direction, and a speed multiplying mechanism operativelyconnected to the pistons of said devices and said turntable and arrangedbelow the top of said turntable, said speed multiplying mechanismincluding an element mounted to rotate with said turntable, acooperating element fixed to said base and a cooperating movable elementto which said pistons are operatively connected, said turntable beingrotated in opposite directions by said hydraulic devices through saidspeed multiplying mechanism at a.speed substantially greater than therate of movement of said pistons.

46. In a mining apparatus, a support, acutter head mounted on saidsupport for rotation about an axis extending longitudinally of saidsupport, a cutter support pivotally mounted on said cutter 'head toswing relative thereto about an axis at right angles to the head axis, akerf cutter carried shaft coaxial with and rotatable relative to saidtransmission shaft, driving connections between said parallel shaft andsaid coaxial shaft and operative connections between said coaxial shaftand saidcutter support. 7

4'7. In a mining apparatus, a support, a cutter head mounted on saidsupport forrotation about an axis extending longitudinally of saidsupport, a cutter support pivotally mounted on said cutter head'to swingrelative thereto about an axis at right angles to the head axis, a kerfcutter carried by said cutter support, motor operated means for drivingsaid kerf cutter including a transmission shaft arranged withits axisalined with the longitudinal axis of said first support, means forrotating said cutter head including a shaft parallel with saidtransmission shaft and journaled on saidrfirst support,drivingconnections between said transmission shaft and said parallel shaft anddriving connections between said parallel shaft and said cutter head,and means for swinging said cutter support about its pivot relative tosaid cutter head including a shaft coaxial with and rotatable relativeto said transmission shaft, driving connections between said parallelshaft and said coaxial shaft and operative connections between saidcoaxial shaft andsaid cutter support, and clutch means for selectivelyconnecting said head rotating con- 'nections and said cutter supportswinging conwith said parallel for driving said kerf cutter including atransmission shaft arranged with its axis alined with the longitudinalaxis of said first support, means 7 for rotating said cutter headincluding a shaft parallel with said transmission shaft and journaled onsaid first support, driving connections between said transmissionshaftand said parallel shaft and driving connections between said parallelshaft and said cutter head, and means for swingingsaid cutter supportabout its pivot relative to said cutter 'head including a shaft coaxialwith and rotatable relative to said transmission shaft, drivingconnections between said parallel shaft and said coaxial shaft andoperative connections between said coaxial shaft and said cuttersupport, said head rotation and cutter support swinging connectionsincluding reversing gearing for effecting head rotation and cuttersupport swing in either of opposite directions whilesaid transmissionshaft rotates continuously in the same direction. j

DWIGHT R. RICHARDS.

